Improvement in quartz-ivlllls



'A OLIVER.

QUARTZ-MILL.

No.18 7,664=. PatentedrFeb. 2d, 1877.

I Wit messes A N.PETER8, FHDT NEH, WASHINGTON: D, C.

ALLEN OLIVER, OF FOREST HILL, CALIFORNIA.

IMPROVEMENT IN QUARTZ-MILLS.

Specification forming part of Letters Patent No- 187,664., datedFebruary 20, 1877; application filed I September 4, 1876.

' substances by means of rolling weights.

These rolling weights I apply and operate so as to avoid the objectionsto the Chili mill or Whirl system, in which connectionthe rolling weightprinciple has heretofore been usually attempted. These attempts,however,

have so far failed to produce a crushing-mill that will operatesuccessfully and economically, principally because of the mechanicaldifficulties encountered in handling the immensely heavy wheels requiredto do the work.

"In my machine I operate the rolling weights by a direct orreciprocating motion, so that I obtain the benefit of direct action andreaction in the working efi'ects of the weights upon the ore in thebattery, and am also able to operate the weights by a direct orrectilinear motion, all as hereinafter more fully described.

In constructing my crushing-mill I first build a strong bed orframe-workof timber, upon which 1 construct the batteries A A. Thesebatteries I place at a short distance apart and parallel with eachother, and each one will consist of a long box, as represented. Thelower part of the sides and ends of the batteries will be constructed ofscreens 12 b, in the usual way, through which the crushed and pulverizedore or pulp will pass after it has been properly reduced in thebatteries. 0 O are my rolling weights or crushers, each of which may bea wheel of the required size and weight, or, preferably, a segment orsemiwheel, as represented. Each wheel or segment is made of the properwidth to fit in one of the'batteries, so that its rim or circular facewill rest upon the bottom of the battery. The circular face of eachwheel I provide with suitable shoes, and the bottom of the batteries Iprovide with suitable dies, so that they can be removed and new onesreplaced as'they wear out.

These provisions, however, will suggest themselves to the practicalmill-man, as they are familiar devices in the construction and operationof all crushing mills. The chief novelty in my improved quartzcrusher,however, consists in imparting to these wheels or circular faced weightsa rocking or reciprocatory rolling-motion inside of the batteries, so asto obtain the advantage, first, of operating them by a directapplication of power; secondly, of increased speed; and, thirdly,ofsubjecting the ore to the action and reaction of the weights, by whichI secure greater crushing capacity.

The weights 0 G I connect together by a shaft, D, which passes acrossabove the batteries, and connects the central point of the weights aboutwhich the curved crushing faces or rims are described. This shaft ispermanently secured to the weights, so that they all move together. Theends of the shaft project beyond the batteries on each side, and atoothed segment or wheel, E, is secured to each extremity. The rims ofthese segments describe the same curve or are as the faces of thecrushing-rockers, and the teeth on their rims engage with a horizontalrack, F, which is constructed below them, as represented. An arm, Gr,extends upward from the middle of the shaft D, between the twobatteries, and a pitman, H, connects the extremity of this arm with acrank, I, of the driving-shaft J, so that the rotation of thedriving-shaft imparts a rocking motion to the shaft D, crushing weights0 O, and toothed segments E.

The toothed segments, by their engagement with the racks F, prevent thecrushing'weights from shifting their position bodily, but allows them toaccomplish a reciprocating semi-rotary motion inside of the batteries.This is necessary, as the centers of the crushingweights, and,consequently, the shaft D, are continually changing their position, andsome device is required to hold the weights to their proper positioninside of the batteries. The pitman H is attached to the arm G of theshaft D by a ballrand-socket or other equivalent oint, K, so that inease one of the weights should pass over an inequality, the machine willnot be cramped, but the flexibility of the joint will permit the weightsto rise and fall, as necessity requires.

The battery will usually be constructed high enough, as represented atM, to permit of an ore-feeder being placed over it, so as to feed theore into the top of the battery or box, and allow it to fall upon theupper straight side of the crushing-rollers; and to accomplish thefeeding properly, I construct the upper or straightside of the weightswith a central ridge and sloping sides, sothat the ore will be equallydivided and fed upon each side. A scoop or raised flange, O, isconstructed around the end and part of the sides of the ridged uppersurface of the weights, so that the ore will be dropped at the center asthe weights move back, and not be fed over the end of the top. I thusprovide for automatically feeding the ore to the stamps in a practicalmanner. A

, To render the batteries air-tight, I arrange a slide,p, in both sidesof each battery through which the shaft D passes, and this slide movesbetween the double walls of the battery, and serves to close the spacewhich the shaft D requires to' travel in. This slide moves with theshaft, and the joint between it and the sides is packed, so as toprevent the escape of dust or sand, while its lower edge moves in atrough of water to render the lower joint tight.

The box or battery M can be raised or lowered by means of screw-rods qq, and the racks F are also arranged to be adjusted in height byscrew-rods r, so that as the faces of the crushing weights or rockerswear away, they can be lowered so as to preserve a uniform contact withthe dies.

This machine can be used for crushing either by wet or dry process. Whenthe wet process is used, I employ a Water-pipe, S, which surrounds eachbattery, and is provided with a number of tubes leading through thesides and ends of the battery, and each tube is regulated by a cock.(Not shown.) The pipe S leads from some reservoir or source of supply,by which a hydraulic pressure is obtained, so that when the cocks areopened a quired in a machine for crushing hard substances. The weightsact and react upon the ore, thus accomplishing better results than wherethe crushing action is only given in one direction. The streams of wateror air loosen up the pulp and agitate it so as to present every particleto the action of the crushers, and also assist in discharging the pulp.The rollingaction of the crushers also assists in forcing the pulpagainst the screens, so that I provide ample means for discharging thepulp as fast as it is reduced fine enough to pass through the screens.Dams can be built around the screens outside of the batteries, andgrooves or channels 00 will lead the pulp into the vessels orreceptacles intended for containing. it.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A crushing-mill consisting of a series of curved faced crusherslocated .in a series of parallel batteries, and upon a shaft provided ateach end with segmental pinions, said crushers having a reciprocatingmotion imparted by pitmen H and racks F, as set forth. 2. The crushingroller or weight 0, provided with a circular lower face and .a straightupper side, said upper side being ridged and provided with a curb orraised flange, O, in combination with the box M, substantially as andfor the purpose described.

In witness whereof I have hereunto set my hand and seal.

ALLEN OLIVER. IL. 8.] Witnesses:

()LWYN T. STACY, GEO. H. STRONG.

